J. A. Menking
YOU?
Author Swipe
View article: In situ production of hybrid N <sub>2</sub> O in dust-rich Antarctic ice
In situ production of hybrid N <sub>2</sub> O in dust-rich Antarctic ice Open
Nitrous oxide (N2O) is a potent greenhouse gas involved in the destruction of stratospheric ozone. Past atmospheric mixing ratios of N2O are archived in ice cores; however, the presence of in situ N2O production in dust-rich Antarctic ice …
Multiple sources of atmospheric CO <sub>2</sub> activated by AMOC recovery at the onset of interglacial MIS 9 Open
Using high-precision ice core measurements of CO 2 , δ 13 C–CO 2 , CH 4 , and N 2 O, this study provides carbon isotope constraints on a sizeable, centennial-scale CO 2 jump at the onset of Marine Isotope Stage 9 (MIS 9). The very end of t…
View article: Glacial‐Interglacial and Millennial‐Scale Changes in Nitrous Oxide Emissions Pathways and Source Regions
Glacial‐Interglacial and Millennial‐Scale Changes in Nitrous Oxide Emissions Pathways and Source Regions Open
During the transition from the Last Glacial Maximum (LGM) to the Holocene, the atmospheric N 2 O mole fraction increased by 80 nmol mol −1 . Using ice core measurements of N 2 O isotopomer ratios, we show that this increase was driven by i…
View article: The Greenland spatial fingerprint of Dansgaard-Oeschger events in observations and models.
The Greenland spatial fingerprint of Dansgaard-Oeschger events in observations and models. Open
Pleistocene Ice Ages display abrupt Dansgaard-Oeschger (DO) climate oscillations that provide prime examples of Earth System tipping points-abrupt transition that may result in irreversible change. Greenland ice cores provide key records o…
A new Australian gas lab for the Million Year Ice Core project Open
The aim of the Australian Million Year Ice Core Project (MYIC) is to drill and recover an ice core that extends to well over a million years ago. Due to the highly thinned nature of the ice close to the bedrock of the MYIC, good vertical s…
View article: The Greenland spatial fingerprint of Dansgaard–Oeschger events in observations and models
The Greenland spatial fingerprint of Dansgaard–Oeschger events in observations and models Open
Pleistocene Ice Ages display abrupt Dansgaard–Oeschger (DO) climate oscillations that provide prime examples of Earth System tipping points—abrupt transition that may result in irreversible change. Greenland ice cores provide key records o…
View article: Characterization of in situ cosmogenic <sup>14</sup> CO production, retention and loss in firn and shallow ice at Summit, Greenland
Characterization of in situ cosmogenic <sup>14</sup> CO production, retention and loss in firn and shallow ice at Summit, Greenland Open
Measurements of carbon-14-containing carbon monoxide (14CO) in glacial ice are useful for studies of the past oxidative capacity of the atmosphere as well as for reconstructing the past cosmic ray flux. The 14CO abundance in glacial ice re…
View article: Comment on tc-2023-121
Comment on tc-2023-121 Open
Abstract. Measurements of carbon-14-containing carbon monoxide (14CO) in glacial ice are useful for studies of the past oxidative capacity of the atmosphere as well as for reconstructing the past cosmic ray flux. 14CO abundance in glacial …
View article: Characterization of in situ cosmogenic <sup>14</sup> CO production, retention and loss in firn and shallow ice at Summit, Greenland
Characterization of in situ cosmogenic <sup>14</sup> CO production, retention and loss in firn and shallow ice at Summit, Greenland Open
Measurements of carbon-14-containing carbon monoxide (14CO) in glacial ice are useful for studies of the past oxidative capacity of the atmosphere as well as for reconstructing the past cosmic ray flux. 14CO abundance in glacial ice repres…
View article: Supplementary material to "Characterization of in situ cosmogenic <sup>14</sup> CO production, retention and loss in firn and shallow ice at Summit, Greenland"
Supplementary material to "Characterization of in situ cosmogenic <sup>14</sup> CO production, retention and loss in firn and shallow ice at Summit, Greenland" Open
Supplement for "Characterization of in situ cosmogenic 14 CO production, retention and loss in firn and shallow ice at Summit, Greenland" by Hmiel et al.Table S1: Measurements and associated corrections for Summit 2013 firn air samples.5Al…
View article: Using ice core measurements from Taylor Glacier, Antarctica, to calibrate in situ cosmogenic <sup>14</sup> C production rates by muons
Using ice core measurements from Taylor Glacier, Antarctica, to calibrate in situ cosmogenic <sup>14</sup> C production rates by muons Open
Cosmic rays entering the Earth's atmosphere produce showers of secondary particles such as protons, neutrons, and muons. The interaction of these particles with oxygen-16 (16O) in minerals such as ice and quartz can produce carbon-14 (14C)…
View article: Using ice core measurements from Taylor Glacier, Antarctica to calibrate in situ cosmogenic <sup>14</sup> C production rates by muons
Using ice core measurements from Taylor Glacier, Antarctica to calibrate in situ cosmogenic <sup>14</sup> C production rates by muons Open
Cosmic rays entering the Earth’s atmosphere produce showers of secondary particles such as neutrons and muons. The interaction of these neutrons and muons with oxygen-16 (16O) in minerals such as ice and quartz can produce carbon-14 (14C).…
View article: Supplementary material to "Using ice core measurements from Taylor Glacier, Antarctica to calibrate in situ cosmogenic <sup>14</sup> C production rates by muons"
Supplementary material to "Using ice core measurements from Taylor Glacier, Antarctica to calibrate in situ cosmogenic <sup>14</sup> C production rates by muons" Open
Average field ± stdev 29.7 ± 4.6 Average lab ± stdev 21.4 ± 3.7 Average postcoring ± stdev 8.2 ± 5.9
View article: Evolution of mean ocean temperature in Marine Isotope Stage 4
Evolution of mean ocean temperature in Marine Isotope Stage 4 Open
Deglaciations are characterized by relatively fast and near-synchronous changes in ice sheet volume, ocean temperature, and atmospheric greenhouse gas concentrations, but glacial inception occurs more gradually. Understanding the evolution…
Forty years later: High resolution continuous flow analysis of the Dye3 ice core Open
<div><span><span>The Dye-3 ice core was drilled to bedrock at the Southern part of the central Greenland ice sheet (65&#176;11'N, 43&#176;50'W) in 1979-1981. The southern location is characterized by high accumula…
View article: Comment on cp-2021-8
Comment on cp-2021-8 Open
Abstract. Deglaciations are characterized by relatively fast and near-synchronous changes in ice sheet volume, ocean temperature, and atmospheric greenhouse gas concentrations, but glacial inception occurs more gradually. Understanding the…
View article: Evolution of mean ocean temperature in Marine Isotope Stages 5-4
Evolution of mean ocean temperature in Marine Isotope Stages 5-4 Open
Deglaciations are characterized by relatively fast and near-synchronous changes in ice sheet volume, ocean temperature, and atmospheric greenhouse gas concentrations, but glacial inceptions occur more gradually. Understanding the evolution…
New data from the 40 year old Dye3 core Open
<p>The Dye3 core was drilled at Dye3 (65&#176;11&#8217;N, 43&#176;50&#8217;W) in 1979 &#8211; 1981. The core has been analyzed for numerous components over the last decades. We measured remaining sections, the You…
Old carbon reservoirs were not important in the deglacial methane budget Open
Small burden from old sources Methane is a potent greenhouse gas with large natural sources, reservoirs, and sinks. Dyonisius et al. found that methane emissions from old, cold-region carbon reservoirs like permafrost and methane hydrates …
View article: Spatial pattern of accumulation at Taylor Dome during Marine Isotope Stage 4: stratigraphic constraints from Taylor Glacier
Spatial pattern of accumulation at Taylor Dome during Marine Isotope Stage 4: stratigraphic constraints from Taylor Glacier Open
New ice cores retrieved from the Taylor Glacier (Antarctica) blue ice area contain ice and air spanning the Marine Isotope Stage (MIS) 5–4 transition, a period of global cooling and ice sheet expansion. We determine chronologies for the ic…
View article: Spatial pattern of accumulation at Taylor Dome during the last glacialinception: stratigraphic constraints from Taylor Glacier
Spatial pattern of accumulation at Taylor Dome during the last glacialinception: stratigraphic constraints from Taylor Glacier Open
A new ice core retrieved from the Taylor Glacier blue ice area contains ice and air spanning the Marine Isotope Stage (MIS) 5/4 transition (74 to 65 ka), a period of global cooling and glacial inception. Dating the ice and air bubbles in t…
The Ross Sea Dipole – temperature, snow accumulation and sea ice variability in the Ross Sea region, Antarctica, over the past 2700 years Open
High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually dated ice core record from the east…
The Ross Sea Dipole – Temperature, Snow Accumulation and Sea Ice Variability in the Ross Sea Region, Antarctica, over the Past 2,700 Years Open
High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the east…
Roosevelt Island Climate Evolution (RICE) ice core isotope record Open
High-resolution, well-dated climate archives provide an opportunity to investigate the dynamic interactions of climate patterns relevant for future projections. Here, we present data from a new, annually-dated ice core record from the east…